What is the likely impact of an OPSEC measure on operational effectiveness, if implemented? What is the probably risk to the mission success (effectiveness) if the unit does not implement the measure? What is the probable risk to the mission success, if an OPSEC measure does not work?
Suffocation is a general term to indicate that form of asphyxia, which is caused by deprivation of oxygen, either due to lack of oxygen in the environment or from obstruction of the air-passages.
Loss of intravascular fluid, that is the blood and water within the blood vessels, can also cause fainting or syncope. Usually, fainting will occur when a person stands up quickly from a lying or sitting position and there isn't enough time for the body to compensate by making the heart beat quicker, or having the blood vessels constrict to maintain the body's blood pressure and blood flow to the brain.